Simon Willison’s Weblog

Researchers Show How to Forge Site Certificates. Use an MD5 collision to create two certificates with the same hash, one for a domain you own and another for amazon.com. Get Equifax CA to sign your domain’s certificate using the outdated “MD5 with RSA” signing method. Copy that signature on to your home-made amazon.com certificate to create a fake certificate for Amazon that will be accepted by any browser.

# 30th December 2008, 3:27 pm / collisions, edfelten, equifaxca, hashes, md5, security, ssl

Hash Collisions (The Poisoned Message Attack). Demonstrates the MD5 weakness by providing two deliberately engineered PostScript documents with the same MD5 hash but radically different rendered output.

# 4th April 2008, 7:24 pm / collisions, hashing, md5, postscript, security